EFORE school started one year, I built a electronic locator thing for the door of my room. It lists various places where I or my roommate could be, so when one of us goes somewhere, we can press a button and an LED will light up next to where that person is.

ome people just wrote their location on their whiteboard, but I had a fondness for gratuitous lights and buttons. You can see the current frontispiece or the old one, which were designed by my roommate Aaron.